Saw-set.



I. 0. STUVLAND.

SAW SET.

APPLICATION FILED APR. 4. 191B.

Wl TNE SSE S 'www Patented Aug. 6, 1918-.

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ATTURNEYS I. 0. STUVLAND.

SAW SET.

' APPLICATION FILED APR. 4. |918. 1 1,274,468. Patented Aug. 6,1918.

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INGWALL O. STUVLALND, OF EVERETT, WASHINGTON.

SAW-SET.

Application filed April 4, 1918.

To all 'ar/tom. t may concern lie it known that l, .lxowane (Y). til'ruv- Lxxn, a citizen of the United States, and a resident of Everett, in the county ol Snohomish and State oit' l'Vashingtou, haie iu vented certain new and nset'tul Improvements in Saw-Sets, o1t` which the following is a specification.

My invention is an improvement in saw sets, and has it'or its object to provide a device ol the character specified especially adapted for setting saws o'l the circular type, wherein a support is provided l'or the saw upon which it may be rotated, and Ineaiis in connection with the support ilor setting the teeth at the proper angle as they are brought into position at the said means, other means being provided, controlled by the setting oli' the teeth, for advancing the saw. l

In the drawings:

Figure l a top plan view of the improved saw set;

Fig. 2 is a vertical section;

Fig. 3 is a view looking il'rom the saw support;

Fig. 4 is a perspective view ol the cam shaft.

1n the present embodiment ol the invention, a suitable base l is provided, and the said base has a longitudinally extending slot 2. A saw support vis mounted to move on the base at the slot, the said support couiprising a ring or collar 3 through which is passed a bolt el, the head ol.f the bolt engaging in the slot, the sides oit the slot being rabbeted at the under face oit' the support 'for receiving the bolt.

A conical collar 5 is adapted to pass over the bolt and to engage within the central opening ot the saw, the said saw resting upon the upper edge oil the ring 3, and it will be noticed that the bore ol the ring .is conical. to lit the conical portion ol the eollar. The collar also has a cylindrical portion 5, and through this portion is passed a set screw 6 :for holding the collar in adjusted position. A nut 't' engages the bolt above the collar, and it will be noticed that the upper' end of the bolt is squared.

At one end of the base is arranged a standard 8, the said standard having lugs 5) which are connected to the base by machine bolts 10, and this standard has a cut away portion at the side adjacent to the saw,

Specification of Letters Patent.

Patented Ane'. 6, 1918.

Serial No. 226,715.

through which the teeth ol" the saw may pass. .lt this cut away portion is arranged an anvil ll, the upper face ot' the anvil beingl ol.r the proper inclination to impart the proper set to the teeth oi the saw when they are struck upon the anvil by the ham- 111er l2, which is mounted to move in the standard toward and 'from the anvil.

rlhe hammer is normally pressed toward the anvil by a spring 13 which is arranged within the slainlard, between a cross pin lll extending diametrically ol. the hammer and a nut l5 which is threaded into the upper end ot the standard, the nut encircling the hammer. The pin 1l serves as a guide 'tor preventing rotation ot the hammer, which is a cylindri'al body, during its vertical movement, the said pin engaging a vertical slot 16 in the standard at the l"ace of the standard adjacent to the saw, and extending through the said slot as shown in Iiig. 2.

lt will be noticed that the lower end of the haunner is beveled or inclined to correspond with the bevel or inclination ol the upper end of the anvil, and the hammer is li'tted by means oit a cam 17 on a shaft 18 which is journaled in a nut 19 held in a threaded nipple in the standard at the 0pposite side t'rom the cut away portion and vfrom the slot 1G. A crank 20 is secured to the outer end ol the shaft, for convenience in rotating the same, and it will be noticed that the cam has two cam portions, so that the hammer will be lifted twice for each complete rotation ot the cam sha'lt.

Means is also provided t'or advancing the saw, the said means comprising` an angle bar consisting ol arms 2l and 22 extending at approximately a right angle with respect to each other, and the arm 2l is pivoted to the standard above and at one side ol the slot lt', and at the lace adjacent to the saw support, as indicated at 23, in such position that the lree end ot the arm 2l will be above the extended end of the pin lll.

A coil spring 2l is arranged between the free end of the arm and a pin on the standard, and this spring normally acts lo hold the angle bar in the position o'lt Fig. 3, that is, with one portion vertical and one horizontal. A set screw 26 is threaded through an arm 2l ot the angle bar, at the pin, for engaging the pin, and the set screw has a lock nut 27 for holding it in adjusted position. A second set screw 28 is threaded 110 connection from the engagement with the l pin 141. The arm 22 is provided at its lower end with a laterally extending finger 30 which engages the teeth of the saw in succession t0 advancethe saw, when the angle bar is swung through the upward movement of the hammer.

The operation of the device is as follows:

The saw support is adj usted to such position, depending upon the diameter of the saw, that the teeth will `rest upon the upper end of the anvil, and the support is secured in this position by means of the nut 7. The saw is rotatable on the support, and when the crank is turned the alternate teeth will be brought in succession between the hammer and the anvil by means of the angle bar 21-22. As the shaft 18 is rotated, the hammer will be lifted twice for each complete rotation, the cam engaging the pin 111-, and whenever the pin is released Vfrom the cam the hammer will be forced quickly downward by the spring 13.

Referring to Fig. l it will be noticed that each cam portion has one face radial to the cam, the said face being at the high end of the cam, and whenever the pin moves off the high portion of the cam the hammer will be driven abruptly toward the anvil. As the hammer moves upwardly under the inliu ence of the cam, the angle bar 21-22 is rocked to cause the j aw tobe advanced the distance of two teeth. A continuation of the movement will set all of the teeth at the proper angle.

It will be understood that the alternate teeth are set, after which the saw is reversed on the support, and the intermediate teeth are set. Each time a tooth is set, the saw is moved a distance ot two teeth, to

bring the next alternate tooth between the hammer Iand the anvil.

Referring to Fig. 2 it will be noticed that the head 31 of the bolt 4C has threaded engagement with the bolt. The bolt also has an annular stop or collar 32 at the bottom of the conical recess in the ring 3, and the bolt also has a polygonal portion 33 at its upper end by meansL of which it may be turned to tighten and make rigid the connection between the collar 3 and the base 1. It willl be understood that the crank 2O might be replaced by a pulley in order that the de- `vice might be operated by power.

l claim A device of the character specified, comi spring, a cam for moving the hammer away from the anvil against the tension of the spring, a saw support for rotatably mounting a saw on the base and adjustable toward and from-the standard, means on the standard for engaging t-he teeth of the saw to advance the same, and a connection between the said means and the anvil for advancing the saw whenever the hammer is lifted, said advancing means comprising an elbow lever having one arm pivoted to the standard and having the other provided with a pawl for engaging the teeth, a pin on the hammer for engaging the pivote'd arm of the elbow lever, and set screws for limiting themovement of the elbow lever, one if the set screws engaging the' pin.

NGVALL 0. STUVLAND.

Vitnesses:

M. Gr. MASON, N. 0. MOVATZ.

Copies of this patent may be obtanedfor ve cents each, by addressingthe Commissioner of Patents,

' Washington, D. IC. i 

